Add rival duels, babysitting service, multilingual !define, economy tuning

Rival System:
- RPS-based duels between combat level 5+ players (best of 3, ties re-prompt)
- Stakes scale with level, split 50/50 between winner and community pot
- 3-4 day randomized challenge interval, 7-day same-pair cooldown
- 24h response window with auto-forfeit
- Full flavor text pools, character sheet integration, !adventure rivals

Babysitting Service:
- Weekly/monthly auto-play service targeting weakest skill
- Babysitter rerolls death, claims items, credits gold and XP
- Rivals automatically declined during service
- End-of-service summary with diaper report

Revive fixes:
- On-demand revive in handleMenu, parseAndResolveChoice, handleStatus
- Morning DM respawn check now runs before babysit interception
- Players no longer stuck dead after DeadUntil expires mid-day

Other changes:
- Multilingual !define searches all DreamDict languages by default
- TwinBee empty haul now shows "jackshit" instead of blank
- Wordle solve payouts increased (e.g. 1-guess: €100 -> €500)
- Per-message euro payouts doubled across all tiers
- Audit fixes: user locks on RPS/babysit handlers, TOCTOU on gold
  transfers, dead code removal, deprecated strings.Title replaced,
  error logging on silent failures

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/plugin/wordle.go

@@ -637,7 +637,7 @@ type WordlePayout struct {
 }
 
 // wordleBasePots maps guess count to euro prize pot. Fewer guesses = bigger reward.
-var wordleBasePots = [7]int{0, 100, 80, 60, 45, 35, 25}
+var wordleBasePots = [7]int{0, 500, 350, 250, 150, 100, 75}
 
 // awardPrize credits euros to all contributors when a puzzle is solved.
 // The solver who got the final guess gets a 50% bonus on their share.
@@ -671,8 +671,8 @@ func (p *WordlePlugin) awardPrize(puzzle *WordlePuzzle) []WordlePayout {
 
 	numPlayers := len(contributors)
 	share := pot / numPlayers
-	if share < 5 {
-		share = 5
+	if share < 10 {
+		share = 10
 	}
 	solverBonus := share / 2